THE ERNEST KEMPTON ADAMS FUND FOR PHYSICAL RESEARCH
                     OF COLUMBIA UNIVERSITY
                                
                         REPRINT SERIES
                                
                                
           INSTANTANEOUS EMISSION OF FAST NEUTRONS IN
                THE INTERACTION OF SLOW NEUTRONS
                          WITH URANIUM
                                
                                
                                
                                
                               BY
                 LEO SZILARD and WALTER H. ZINN
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
Reprinted from THE PHYSICAL REVIEW, Vol. 55, No. 8, April 15, 1939